Referring to the infallible excellence of the Nas album Illmatic, Chillmatic is when the vibe is so good you know things are gonna be chill no matter what happens. It's a laid-back state where nothing can go wrong.

1) Bryan surveyed the party: hot babes and Hennessy. He pronounced it chillmatic.
2) Robert told his friends he would be free all week. Although he had a calculus exam later, he was so ill at math he knew it was going to be chillmatic.

The Urban Dictionary Mug

Chillmatic (Noun): 1. A experience you get when you mix high vibrations of enlightened thinking with free spirits.
2. a hybrid of relaxation or happiness mixed with intelligent dialogue. this being birth from the idea of Nas's illmatic but with an vibed out experienced
3. Being Hype but fully aware of the world around you

Word's Origin: Juhhad Leone released a brand with this name in 2016 and when asked about it during an online interview with Bound2HipHop in Canada he gave the explanation of this word